I was replying to:
> There is no difference between 3/4 and 6/8
Which is simply wrong. There's no difference in the number of 8th notes. And the same music can be written and felt when written as two bars of 3/4 with quarter notes versus one half-speed bar of 6/8. But that's a much more qualified point.
There is a distinction, and it's not in the notation itself but in what the notation means.
To say there's no difference is like saying present tense and past tense of "read" has no difference in pronunciation. Of course, the plain letters fail to capture the difference, and the difference can be confused at times, and is just a matter of convention. In the case of 3/4 and 6/8, they have a different accent structure, and thus a different musical feeling by convention, and discussing that difference was the only point of the article that this comment was relating to.